Colle System: Pterodactyl Variation
ECO A40 ยท Colle System
The Colle System: Pterodactyl Variation (A40) is a chess opening in the Colle System family, played by White. It arises after the moves 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+.
Moves: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
About this opening
The Pterodactyl variation arises from a Colle System move order where Black adopts a hypermodern setup: a g7 fianchetto, ...c5 and the ...Qa5+ check to hamper White's development and pressure the long diagonal. The play is asymmetrical and combative, Black seeking counterplay rather than symmetry. It is an original line, with an evocative name, for fans of atypical positions.